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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 41:

Certain useful waxes are composed mainly of

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A Amino acids
B Glycerols
C Alkanols
D Alkanoates

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Question 42:

The IUPAC nomenclature of compound CH₃CH₂COOCH₂CH₃ is

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A Propyl ethanoate
B Ethyl butanoate
C Ethyl propanoate
D Methyl butanoate

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Question 43:

When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit of

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A Calcium tetraoxosulphate(VI)
B Calcium trioxocarbonate (IV)
C Calcium hydrogentrioxocarbonate (IV)
D Aluminium trioxocarbonate (IV)

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Question 44:

A supersaturated solution is said to contain

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A More solute than it can dissolve at that temperature in the presence of undissolved solute
B As much solute as it can dissolve at that temperature in the presence of undissolved solute
C As much solute as it can dissolve at that temperature
D More solute than it can dissolve at that temperature

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Question 45:

The presence of nitrogen in air is to slow down

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A Respiration and combustion
B Combustion and corrosion
C Corrosion and respiration
D Respiration and transpiration

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